Milton a



Feb. 20, 1923.

M.' A. FESLER LIQUID FUEL BURNER Filed NOV. 11, 1919 Patented Feb, 20, 1%23.

MILTON A. FESLEE, OF OAKLAND, CALIFORNIA, ASSIGNOR TO PETROLEUM HEAT AND POJVER COMPANY, A CORPORATION OF DELAWARE.

. LIQUID-FUEL BURNER.

Application filed November 11, 1919. .Seiial No. 337,176.

To all 1071 0272, it may concern:

' Be 't known that. l, MILTON A. Fnsmzii, citizen of the United States, residing at Oakland, in the county of i-ilameda and State of Californiaphave invented an Impro'vemlent in Liquid-Fuel Burners, of

which the following description, in connection withv the accompanying drawings, is a specification, like characters on the drawings representing like parts. v i I The inventionto be hereinafterdescribed -.relates to liquid fuel burners, and more control of} a suitable valve. usually set manually in a predetermined poparticularly to burners in whichthe liquid fuel is atomized or delivered in spray form by steam or other fluid pressure.

Burners. of this type usually comprise steam and fuel passages for conducting the steam and fuel to the delivery end of the burner where they are delivered under the The valve is sit-ion of'a'djustment to deliver the quantity of fuelr'equired from the burner. 'Thesupply of fuelisregulatedjby a valve in the fuel feed pipe leading to the burner, and

the supply of steam or other fluid is controlled by a valve in the pipe for conducting the same to the burner;

One of the purposes of the present invention is to provide valve means for controlling the delivery of the fuel and steam or fluidfrom the burner which willbe automatically responsive to; the pressure of the steam or fluid, and will therefore. automatically regulate the delivery of fuel according to the steam pressure. For example. if the steam pressure isincreased, the 'valve will automatically respond there- "to and increase the opening between the valve and its seat and deliveran increased volume offuel from the burner. On the other hand, if the steam pressure is reduced, the valve will automatically move toward its seat and reduce the amount of fuel delivered, and if the supply of steam is entirely shutoff, the valve will automatically close to its seat and prevent the delivery offuel from the burner.

Another purpose of the invention is to provide a valve device for the burner which will produce a desirable eflicient intermingling of the fuel and steam and atomization of the fuel. p

Another purpose of the invention is to provide the burner with an orifice for 'de liveringthc fuel from the burnerin transversely curved fan form which will facilitate the efflcient introduction of air to the fuel to promote the combustion thereof.

Another purpose of the invention is to provide simple and efficient means for blowing residual fuel from the fuel conducting passage when the burner is to be shut off.

And still another purpose of the invention is to provide a simple, compact, selfthrough a burner embodying the invention;

Fig. 2. on an enlarged scale is a front ,end view of the burner; and

Fig. 3 on an enlarged scale is a vertical transversesection taken on line 3-3 of Fig. 1.;

Referring to the drawing," the. burner shown therein as embodying the invention, comprises a casing conveniently in the form of a barrel or tube 1 having its rear end threaded into a head 3 provided with a neck 5 for connection with a steam or other fluid supply pipe, and a neck for connection with an oil or other fuel supply. pipe.

At the front end of the tube or barrel 1 is a head 9 threaded to said tube and con taining a delivery chamber 11 provided with an orifice 13 for delivering the fuel from the burner: This orifice may. be desirably in the form of an elongated slit curved to deliver the fuel in transversely curved fan form. This slit may have a minimum Width midway-hetween the ends thereof, and may which will contribute to the efiicient introductionof vair to the atomized fuel. In other words, when air is directed transversely toward the path of the fuel, the transversely curved character of the fuel will tend to pocket the'ai'r and fac1l1tate the control of the mixture of an With the fuel.

30 thence farm:

Within the tube or barrel 1 lStLnf oil "or other fuel conducting passage conveniently afl'orded by a tube having its rear end threaded toan elbow 17 in the head 3 referred to, and communicating with the oil or fuel supply neck 7. The inner tube pro ects toward the delivery head 9, and is spaced sufliciently from thetube 1 to leave. an ample steam conducting passage '19. Lugs 21 may be interposed between, the fuel and steam conductingtiubes tocontribute to the proper centering ofthe fuel tube in the steam tube. Suitable valve means may be )rovided for controlling" the discharge of I tli steamjjfrom the fuel and steam conducting passages intothe delivery head. This valve means, in the present instance of the. invention,-c oinp'rises a singleconical valve 23 co- ;operating withiseats afl'orded by bushings 2 5fa'1id 27 fitted into the steam conducting, tube and the fuel conducting tube respectivelye Spite-bl e, inansmay be provided to autoi natic lly close; said Valve to said seats, but allow the" valve toopenin res )onse to the p res'surebf the steam or other uid thereon.

,liisf meansin the"p1'esent instance. comprises a stem 29 threaded or otherwise secured to the valve and projecting rearward throu h the fuel conducting tube 15, and

f the elbow 17 and the rear end of the headB, where it ree'eives' a coil spring 31- confined between an end-of said he ed ma washer 33 secured by an adjusting nut 35 and a lock nut 37. The spring 35 maybe enclosed by a cap 41 screwed onto a Iiepk, 43projectirearwardly from the head 3., T he. construction is such that the sprin -'will tend to. shift the stem 29 rearwardly and n i ve'th valvefe'ato the eats 25 nd 27,1011: when steam is admitted t0 the steam passage,

spririg :will yield under the pressure th'ereonjand, allow the valve to move from its seats, andQ the'. amount of fuel delivered will herproportibnal; to the pressure of the steam.

The fuel'and steam willflow through the annular passage thus afforded b the opening 'ofvthe valve, andfwill be desira ly mixed and intermingled'w iefli atomizins effecton' the fuel o.nl,fiow thereotpast the rather front end of the conicalvalve. The heat -may hayean; inturnedfiange 45 adjacent theflvalve, which will tend to direct the fuel stea mvin'wardly of the delivery chamber 11, andthereby further contribute ci'entatomization oi hfi fuel. p

,The cap 41, may be readily removed to fur 'to the.interniinglinglthereof, and the eflililshnonvenient access to the nuts 35' andv 3,7

to permit thje tension of the coil spring 31 6 0 to, ,be varied according to conditions'as desired p pp su t ble. means. may be rovided to enable the blow out re'si ual fuel from;the

W :6 the burner isto be shutoif. To

accomplish t is, inthe present instance, the

e fuel and v elbow 17 referred to, may be provided with a port 47 (Fig. having a tapered seat 49 co-operating with a needle valve 51 on a stem 53 having a portion 55 threaded in a sleeve 57' screwed intoa neck 59 pro ecting from the head 3. To prevent leakage past the steni 53, suitable acking 61 may be confined between the end of the sleeve 57 and a cap 63 threaded to said sleeve. The outer end of the needle valve stem 53 ma be provided with a suitable handle 65. he con struction is such that thehandle may be rotated to withdraw the needle valve 51; from the seat 49, thereby fadmittin steam" from the chamber surrounding t e elbow 17 tl'irou'g'h the ort 47 into the tube 15 to blow out any resi ualfuel therefrom,

In use, on admission of the fuel and steam or other fluid into the fluid and' steamjpassages respectiVeIyJthe valve 6 23 will. respond to the pressure thereof and automatically "move from its'seats, thereby allowmgflow of the fuel and fluid into the chamber-in the delivery head}? and the deliyery',thereof from said chamber through the orifice 18. The valve will automatically res ond tothe pressure, andallow a 'reater or ess amount of fuelto be deliverefi from the bur'n'erjin proportion to the" pressure. When the su ply of steam is shut off, the coil spring 1 will automatically closetlie valve to its seat.

B my invention there'is froyided a. pie, compact, self'contained .burner which may be readily operatedand controlled as desired, and a burner which-will efliciently mix the steamor fluid withthe fueland thoroughly atomizethe latter,

able in responseto steam pressure on the valve to allowthe latter to: open.

2, A liquid fuel burner, comprisin in combination. a steam conducting tube,- a ea-d connected to said tube having necks for. connection with steam and oil supply pes, an

elbow mounted-in said head and communieating with said oilslupply neck, oil conducting tube mounted in said steam :conducting tube and connected with said elbow, a delive-ryhead connectedfto said stea/m conducting tube, a single valve at the delivery end of said. tubes and cooperating with each of the tubes to control the discharge of the steam and oil from their respective tubes into said delivery head, and means includfor controlling the discharge of both the oil and steam from their respective passages, a stem projecting from the valve through one of the passages beyond said casing, a spring adjustably secured to said stem to urgethe valve to closed position, and acap for the spring detachab-ly connected to the casing to allow ready access to the spring.

4. A liquid fuel burner, comprising, in

combination, a casing having an end provided with a delivery orifice, a fuel conducting tube mounted in said casing and spaced therefrom to provide a fluid conducting passage between said tube and casing and surrounding the tube, a. single valve mounted in said casing and in the path of travel of the fuel and fluid for controlling' the discharge of both the fuel and fluid from the casing, a member connected to said valve and projecting rearwardly beyond said casing, and a spring co-operating withsaid member tending to move said valve to closed position, but yieldable in response to the pressure of the fluid upon the valve to allow said valve to open.

5. A liquid fuel burner, comprising, in

. combination, a casing having a delivery end and provided with fiiel and fluid conducting passages leading to said delivery end, said passages having Separate valve seats at their delivery ends, a single valve coopeaiting with both of said seats to control the deliv 'ery of fuel and fluid from said passages to said delivery end, said valve being movable to open position in response to the pressure of the fluid thereon, and means for automatically closing said valve to interrupt the deliveryof' fuel and fluid when the supply thereof is shut off. I

.6. A liquid fuel burner, comprising, in combination, a casing having a. fuel conduct ing tube therein and spaced therefrom to leave a fluid conducting passage, a single valve for controlling the discharge of both the fuel and fluid from said tube and passage respectively, spring means tending constantly to close said valve, said tube having a port communicating with said passage, and a valve adapted to be opened to admit fluid from said passage into said tube to blow residual fuel-from the latter.

said casing having a val e seat andspaced from said casing to provide a fluid conduct ing passage between the tube and easing, a single valve co-operating with both of said seats to control the discharge of the fuel and fluid from the casing, and spring means tending to moves-aid valve toward said seats to'interrupt the flow of fuel and fluid from the casing, and yieldable in response to pressure of the fluid on the valve to allow the latterto open.v

8. A liquid fuel burner comprising, in

combination, a casing provided with fuel and fluid passages having their discharge ends adjacent each other, a single valve engaging the discharge ends of both of the passages and operable to control the dis charge of fuel and fluid from said ends, and means for yieldingly retaining said valve in its closed position and allowing the valve to open automatically in response to the fluid pressure upon it a distance proportional to said pressure.

9. A liquid fuel burner comprising, in combination, an inner tube having a passageway therethrough, an outer tube surrounding the inner tube and having a passageway between the inner and outer tubes, con nections for delivering fuel to one of the passage-ways and fluid to the other passageway, each of said tubes having a valve seat at the delivery end thereof, a single valve co-operating with each of said seats, a. stem connected to said valve and extending therefrom through the inner tube, and a spring acting upon the stem and tending constantly to force the valve into closing engagement with said seats, but yielding in response tothe pressure of said fluid upon the valve to open the valve and allow discharge of the fuel and fluid from the burner.

10. A liquid fuel burner, comprising, in combination, a casing provided with fuel and fluid conducting passages, having discharge openings provided with independent valve seats, a single valve cooperating with both of said seats to control the discharge of both the fuel and fluid from the respective openings, and spring means tending constantly to close said valve, but yieldable in response to the pressure of the fuel or fluid to open and allow discharge of the fuel and fluid between the valve and said seats. I

11. A liquid fuel burner, comprising, in combination, a casing provided with an inner fuel conducting tube and a steam conducting tube surrounding the inner tube to heat the fuel within the inner tube, said tubes having independent valve seats, and a valve cooperating with both of said seats for controlling the discharge of fuel and steam from said tubes.

12. In a fuel oil burner, the combination of a casing having separate oil and atomizing fluid conducting passages therein, valve means for controlling the delivery of oil and atomizing fluid from said passages, said valve means being movable to open by and proportionally to the volume of atomizing fluid passing therethrough and to admit oil by said opening movement in proportion to the volume of atomized fluid admitted, and spring means automatically to reduce the valve Opening on reduction in the volume of atomizing fluid passing therethrough.

13. In a fuel oil burner, the combination of a casing, passages for conducting oil and steam thereto, one of said passages encircling the other, a valve seat adjacent the delivery ends of said pasages, valve means cooperating with said seat to control the flow of oil and steam, and spring means tending to move said valve means toward its seat, said valve means having a surface subject to the pressure of the flow of steam through the steam passage to move said valve means away from its seat against the resistance of said spring means.

In testimony whereof, I have signed my name to this specification.

MILTON A. FESLER. 

